Installation Requirements; Installation Considerations - Garmin GDU 370 Installation Manual

3.5 Installation Requirements

3.5.1 Equipment Available
Model
GMU 44
*Included in G3X LRU Kit (K10-00016-00)
Sub Assy, Connector Kit, GMU 44
GMU 44 Universal Mount***
Installation Rack, GMU 44
**Included in G3X Installation Kit (K10-00017-00)
***Refer to AHRS Magnetometer Installation Considerations (190-01051-00) from

3.6 Installation Considerations

If the requirements listed in Table 3-7 cannot be met, a magnetometer
interference test must be performed to ensure proper operation of the
G3X system.
Considerations document (190-01051-00) available from the Garmin
website (
The following guidelines describe proper mechanical installation of the Garmin GMU 44 Magnetometer.
The guidelines include requirements for proper location selection in the aircraft, requirements for
supporting structure and mechanical alignment and restriction on nearby equipment.
Fabrication of a wiring harness is required. Sound mechanical and electrical methods and practices are
required for installation of the GMU 44. Refer to Section 1.6 for wiring considerations and to Appendix
A for pinouts.
The instructions needed to assemble the circular connector are located in Appendix B.
The GMU 44 is an extremely sensitive three-axis magnetic sensor. It is more sensitive to nearby
magnetic disturbances than a flux gate magnetometer. For this reason, when choosing a mounting
location for the GMU 44, observe the following distances from objects or devices that can disturb the
magnetic field. Table 3-7 specifies required distances from magnetic disturbances for GMU 44 location.
G3X Installation Manual – GMU 44
190-01115-01
Table 3-5. GMU 44 Part Numbers
Catalog Part
Number
010-00296-10*
Table 3-6. GMU 44 Accessories
Item
NOTE
Refer to the AHRS/Magnetometer Installation
.
www.garmin.com)
Unit Part Number
011-00870-10
Garmin P/N
011-00871-00**
011-01779-01
115-00481-10**
Installation Rack
No
Quantity
1
1 (optional)
1
www.garmin.com
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Revision A